There are many alternatives to Obsidian for Android if you are looking for a replacement. The best open source Android alternative is Logseq. If that doesn't suit you, our users have ranked more than 100 alternatives to Obsidian and many of them are open source and available for Android so hopefully you can find a suitable replacement. Other interesting open source Android alternatives to Obsidian are Joplin, Notesnook, Standard Notes and AppFlowy.
Local-first, privacy-focused notebook supporting Markdown and Emacs Org mode. Offers offline use, encrypted backups, plugin extensibility, LaTeX support, real-time collaboration, and hierarchical organization for personal knowledge management.
Open source app for managing notes and to-dos with Markdown support. Syncs seamlessly across devices using services like Dropbox and OneDrive. Offers end-to-end encrypted synchronicity, offline access, rich import/export options, and a Web Clipper for browsers.
Offers open-source, end-to-end encrypted notes with device-based privacy, cross-platform support, private vault, secure sync, offline access, markdown editor, exports to multiple formats, automatic backups, organizational tools, and strong encryption.
Secure note-taking app with end-to-end encryption, unlimited syncing across all platforms, offline access, detailed organization through tags, strong passcode and biometric protections, and premium features like encrypted files, themes, web clipper, super note types, and hardware key support.
Open-source workspace offering complete data control, deep customization via themes, plugins, and templates, native multi-platform support using Flutter and Rust, offline access, privacy features, collaborative tools, and easy extensibility for all users.
Cloud-based, open-source note-taking app supporting plain text notes, lists, and ideas with real-time sync, multi-device support, version history, markdown, tagging, collaborative editing, no ads, and free registration required for all cloud features.
Open-source, privacy-focused workspace combining note-taking, project and task management, Kanban board, interactive whiteboard, Pomodoro timer, Markdown support, offline access, real-time team collaboration with @mentions, goal tracking, subtasks, and customizable features.
SiYuan is a desktop Markdown Block-Reference and Bidirectional-Link note-taking application. Support fine-grained block-level reference and Markdown WYSIWYG.
GNU Emacs is an extensible, customizable text editor—and more. At its core is an interpreter for Emacs Lisp, a dialect of the Lisp programming language with extensions to support text editing. The features of GNU Emacs include:
Offline in-device task manager and note app featuring smart creation, advanced organization, calendar and list views, Markdown notes, secure SHA-256 encryption, Material You theming, multiple color themes, no tracking or ads, and import/export for total ownership.
Offline-first, self-hostable note app supporting rich text formatting, tag-based organization, customizable backgrounds, pinning, search, archiving, admin management, trash recovery, mobile and web access, sync, privacy safeguards, and dark or light themes.
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Logseq is incredibly innovative and it respects my privacy and freedom by providing Free and open source software as opposed to proprietary tools.